Realistic Generation of Pseudo-wells Using Pseudo-geo-statistics

Pseudo-wells have a long history in the domain of reservoir characterisation. They are most frequently used to complete the regionally sparse information provided by wells and to assess uncertainties on seismic interpretation and reservoir properties. When building pseudo-wells the key question is how geologically representative they are. In this paper we present a new approach for creating pseudo wells which is based on pseudo-geo-statistics rather than simple interpolation or pure statistics. Our approach leads to the creation of realistic realisations of the geology, whilst still exploring the geological domain. We present an application of the technique in a North Sea clastic environment reservoir where the thicknesses of the layers are far below the seismic resolution. It has permitted to derive a relationship between sand thickness and picking error.